server/serial.c

   1 /*
   2  * Server-side serial port communications management
   3  *
   4  * Copyright (C) 1998 Alexandre Julliard
   5  * Copyright (C) 2000 Mike McCormack
   6  *
   7  * TODO:
   8  *  Add async read, write and WaitCommEvent handling.
   9  *
  10  */
  11
  12 #include "config.h"
  13
  14 #include <assert.h>
  15 #include <fcntl.h>
  16 #include <stdio.h>
  17 #include <string.h>
  18 #include <stdlib.h>
  19 #include <errno.h>
  20 #ifdef HAVE_SYS_ERRNO_H
  21 #include <sys/errno.h>
  22 #endif
  23 #include <sys/stat.h>
  24 #include <sys/time.h>
  25 #include <sys/types.h>
  26 #include <time.h>
  27 #include <unistd.h>
  28 #include <utime.h>
  29 #include <termios.h>
  30 #include <sys/ioctl.h>
  31
  32 #include "winerror.h"
  33 #include "winbase.h"
  34
  35 #include "handle.h"
  36 #include "thread.h"
  37 #include "request.h"
  38
  39 static void serial_dump( struct object *obj, int verbose );
  40 static void serial_destroy( struct object *obj );
  41 static int serial_get_read_fd( struct object *obj );
  42 static int serial_get_write_fd( struct object *obj );
  43 static int serial_get_info( struct object *obj, struct get_file_info_request *req );
  44 static int serial_get_poll_events( struct object *obj );
  45
  46 struct serial
  47 {
  48     struct object       obj;
  49     char                name[16]; /* eg. /dev/ttyS1 */
  50     int                 access;
  51
  52     /* timeout values */
  53     unsigned int        readinterval;
  54     unsigned int        readconst;
  55     unsigned int        readmult;
  56     unsigned int        writeconst;
  57     unsigned int        writemult;
  58
  59     unsigned int        eventmask;
  60     unsigned int        commerror;
  61
  62     struct termios      original;
  63
  64     /* FIXME: add dcb, comm status, handler module, sharing */
  65 };
  66
  67 static const struct object_ops serial_ops =
  68 {
  69     sizeof(struct serial),        /* size */
  70     serial_dump,                  /* dump */
  71     default_poll_add_queue,       /* add_queue */
  72     default_poll_remove_queue,    /* remove_queue */
  73     default_poll_signaled,        /* signaled */
  74     no_satisfied,                 /* satisfied */
  75     serial_get_poll_events,       /* get_poll_events */
  76     default_poll_event,           /* poll_event */
  77     serial_get_read_fd,           /* get_read_fd */
  78     serial_get_write_fd,          /* get_write_fd */
  79     no_flush,                     /* flush */
  80     serial_get_info,              /* get_file_info */
  81     serial_destroy                /* destroy */
  82 };
  83
  84 /* SERIAL PORT functions */
  85
  86 static void serial_dump( struct object *obj, int verbose )
  87 {
  88     struct serial *serial = (struct serial *)obj;
  89     assert( obj->ops == &serial_ops );
  90
  91     fprintf( stderr, "Port fd=%d name='%s' mask=%x\n",
  92              serial->obj.fd, serial->name,serial->eventmask);
  93 }
  94
  95 /* same as file_destroy, but don't delete comm ports */
  96 static void serial_destroy( struct object *obj )
  97 {
  98     assert( obj->ops == &serial_ops );
  99 }
 100
 101 struct serial *get_serial_obj( struct process *process, int handle, unsigned int access )
 102 {
 103     return (struct serial *)get_handle_obj( process, handle, access, &serial_ops );
 104 }
 105
 106 static int serial_get_poll_events( struct object *obj )
 107 {
 108     struct serial *serial = (struct serial *)obj;
 109     int events = 0;
 110     assert( obj->ops == &serial_ops );
 111     if (serial->access & GENERIC_READ) events |= POLLIN;
 112     if (serial->access & GENERIC_WRITE) events |= POLLOUT;
 113     return events;
 114 }
 115
 116 static int serial_get_read_fd( struct object *obj )
 117 {
 118     struct serial *serial = (struct serial *)obj;
 119     assert( obj->ops == &serial_ops );
 120     return dup( serial->obj.fd );
 121 }
 122
 123 static int serial_get_write_fd( struct object *obj )
 124 {
 125     struct serial *serial = (struct serial *)obj;
 126     assert( obj->ops == &serial_ops );
 127     return dup( serial->obj.fd );
 128 }
 129
 130 static int serial_get_info( struct object *obj, struct get_file_info_request *req )
 131 {
 132     assert( obj->ops == &serial_ops );
 133     req->type        = FILE_TYPE_CHAR;
 134     req->attr        = 0;
 135     req->access_time = 0;
 136     req->write_time  = 0;
 137     req->size_high   = 0;
 138     req->size_low    = 0;
 139     req->links       = 0;
 140     req->index_high  = 0;
 141     req->index_low   = 0;
 142     req->serial      = 0;
 143     return 1;
 144 }
 145
 146 /* create a serial */
 147 DECL_HANDLER(create_serial)
 148 {
 149     struct serial *serial;
 150     int fd,flags;
 151     struct termios tios;
 152
 153     req->handle = -1;
 154
 155     flags = 0;
 156     switch(req->access & (GENERIC_READ | GENERIC_WRITE))
 157     {
 158     case GENERIC_READ:  flags |= O_RDONLY; break;
 159     case GENERIC_WRITE: flags |= O_WRONLY; break;
 160     case GENERIC_READ|GENERIC_WRITE: flags |= O_RDWR; break;
 161     default: break;
 162     }
 163
 164     fd = open( req->name, flags );
 165     if(fd < 0)
 166     {
 167         file_set_error();
 168         return;
 169     }
 170
 171     /* check its really a serial port */
 172     if(0>tcgetattr(fd,&tios))
 173     {
 174         file_set_error();
 175         close(fd);
 176         return;
 177     }
 178
 179     serial = alloc_object( &serial_ops, fd );
 180     if (serial)
 181     {
 182         strncpy(serial->name,req->name,sizeof serial->name);
 183         serial->name[sizeof(serial->name)-1] = 0;
 184
 185         serial->access       = req->access;
 186         serial->readinterval = 0;
 187         serial->readmult     = 0;
 188         serial->readconst    = 0;
 189         serial->writemult    = 0;
 190         serial->writeconst   = 0;
 191         serial->eventmask    = 0;
 192         serial->commerror    = 0;
 193
 194         req->handle = alloc_handle( current->process, serial, req->access, req->inherit );
 195         release_object( serial );
 196     }
 197 }
 198
 199 DECL_HANDLER(get_serial_info)
 200 {
 201     struct serial *serial;
 202
 203     if ((serial = get_serial_obj( current->process, req->handle, 0 )))
 204     {
 205         /* timeouts */
 206         req->readinterval = serial->readinterval;
 207         req->readconst    = serial->readconst;
 208         req->readmult     = serial->readmult;
 209         req->writeconst   = serial->writeconst;
 210         req->writemult    = serial->writemult;
 211
 212         /* event mask */
 213         req->eventmask    = serial->eventmask;
 214
 215         /* comm port error status */
 216         req->commerror    = serial->commerror;
 217
 218         release_object( serial );
 219     }
 220 }
 221
 222 DECL_HANDLER(set_serial_info)
 223 {
 224     struct serial *serial;
 225
 226     if ((serial = get_serial_obj( current->process, req->handle, 0 )))
 227     {
 228         /* timeouts */
 229         if(req->flags & SERIALINFO_SET_TIMEOUTS)
 230         {
 231             serial->readinterval = req->readinterval;
 232             serial->readconst    = req->readconst;
 233             serial->readmult     = req->readmult;
 234             serial->writeconst   = req->writeconst;
 235             serial->writemult    = req->writemult;
 236         }
 237
 238         /* event mask */
 239         if(req->flags & SERIALINFO_SET_MASK)
 240         {
 241             serial->eventmask = req->eventmask;
 242         }
 243
 244         /* comm port error status */
 245         if(req->flags & SERIALINFO_SET_ERROR)
 246         {
 247             serial->commerror = req->commerror;
 248         }
 249
 250         release_object( serial );
 251     }
 252 }
 253